Rotary motor.



No. 6fi9,035. Patented Feb. 26', l90l. c. w. NEWTON.

ROTARY MOTOR.

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No. 669,035. Patented Feb. 26, I90l.

C. W. NEWTON.

ROTARY MOTOR.

(Application filed June 8, 1900.}

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, lINTTnn STATES PATENT OTTTCE.

CHARLES W. NEWTON, OF KANSAS CITY, MISSOURI;

ROTARY MOTOR.

SPECIFICATION forming part of Letters Patent N 0. 669,035, dated February 26, 1901.

Application filed June 8, 1900. Serial No. 19,552. (No model.)

T at whmn it may concern.-

Be it known that 1, CHARLES W. NEWTON, a citizen of the United States, and a resident of Kansas City, in the county of Jackson and State of Missouri, have invented new and useful Improvements in Rotary Motors, of which the following is a specification.

My invention relates to improvements in rotary motors and to that class of rotary motors in which steam is used expansively. One object of my invention is to provide novel means for promoting the efiiciency of a motor of this class.

Another object is to provide improved devices for varying the cut-oflf of the valves.

My invention relates particularly to an improved form of piston the use of which reduces the peripheral friction of said piston to a minimum.

My invention is fully illustrated in the accompanying drawings as adapted for steampower.

In the drawings, Figure 1 is an elevation of a motor provided with my improvements with one of the casing-plates and the eccentric and eccentric-rod removed and the partition partially removed. Fig. 2 is an elevation of the same side of the motor, showing the eccentric and eccentric-rod. Fig. 3 is a central vertical section of the motor, except that the valve-chest and eccentric are not in section. Fig. 4 is a partially-sectional view of the valve-chest,-valves, and valve-gear. Fig. 5 is a vertical section of one of the valves and its seat, taken on the broken lineVV of Fig. 4. Fig. 6 is a section through the rocking shaft looking toward the valve-gear. Fig. 7 is an edge view of one of the pistons detached.

1 designates the main frame of the motor, having the form of a hollow cylinder divided into equal cylindrical parts by a vertical partition 2. Secured to opposite sides of the frame are two casing-plates, each of which is provided with a bearing 3 for the driving-shaft 4. Secured to said shaft are two piston-wheels 5 and 6, a pulley 7, and an eccentric 29. The piston-wheels are precisely alike, as are the pistons 8 and 10 and the abutments 12 and 14:, so that a description of one of each of these parts will apply to both.

As shown in Fig. 1, the periphery of the piston-wheel 6 has formed thereon a cam 16. The piston 10 is made in two sectionsa main plate 10 and a narrow plate 11, pivotally secured to plate 10. The inner edge of plate 10 has the form of a nearly cylindrical pivot which is retained in a socket 17, formed in cam 16. Said plate 10 is provided near said pivot with a shoulder 18, which is normally in contact with a stop 19, formed on the adjacent lip of the socket 17. The secondary joint 13, between piston-plates 10 and 11, is like the joint above described. The outer edge of plate 10 is prevented by shoulder 18 from touching the cylinder surface; but steam-tight contact therewithis made by plate 11. My object in employing this form of piston is to reduce the friction between the piston and cylinder by transmitting the greater portion of the steam-pressure on said piston direct to the piston-wheel 6 by the construction just described. The inner periphcry of the cylinders, in which piston-wheels 5 and 6 revolve, is formed as shown in Fig. 1, being provided with a gradually-incurving portion 1". Said portion 1 is bounded in one direction by the abutments l2 and 14, and in the other direction it merges into the circular frame of the motor, which is concentric with shaft 4.

Between the inlet-port 20 and the exhaustport 21 an abutment 14: is hung pivotally from a socket 22, formed in the portion 1. Said abutment has substantially the same construction as the piston 10. Socket 22 forms an arc of a little over one hundred and eighty degrees, so that the abutment is prevented from falling therefrom, but is free to be tilted in the direction of the pistons revolution sufficiently to permit said piston to pass beneath it.

In the two cylinders of the motor both of the abutments and both of the pistons have the same width as the piston-wheels 5 and 6, which is the interior width of said cylinders.

Piston 8 on piston-wheel 5 is set diametrically opposite to piston 10 on piston-wheel 6. The former is shown in Fig. 1. The steam ports, however, are all placed at the top of the motor. (See Fig. 4:.)

The inlet-ports 20 and 20 are formed partly in the main frame 1 and partly in the valvechest 23. They unite at 24: with a short extension which terminates in a flanged steamcoupling 25.

Inlet-port 20 is intersected by a valve 26 and'inlet-port 20 by valve 27. Said valves have the form of recessed or mutilated cylinders. Fig. 5, a section through the valvechest, shows valve 26 in open position and port 20. In Fig. 4. the same valve is shown in closed position. Said valves are traversed longitudinally by a rocking shaft 28, which is concentric with the valve-seats, but is not secured to the valves. Said shaft is oscil lated from the main shaft 1 by means of cocentric 29, red 30, and crank 31. Rocking shaft 28 is mounted in bearings 32, which are secured to the valve-chest, and are provided with flanges which cover the packing-rings 33. When said bearings are removed, the valves may be easily removed from the valvechest. Packing-rings 34 are also provided at the inner ends of the valve-seats.

Valve 26 is provided with an inward extension 35 of reduced diameter, and adjustably secured thereon is a dog 36. At a suitable distance from said dog upon the rocking shaft is adj ustably secured a collar 37 by means of a projecting screw-stud 38, which is of sufficient length to be engaged by the-arm of dog 36. Between said dog and said collar is a stud 39, rigidly secured in rocking shaft 28. The arm of dog 36 is always between stud 38 and stud 39. (See Fig. 6.) Near valve 27 is a precisely similar arrangement of parts, consisting of a dog 40, a stud 41, and an adjustable stud 42.

The exhaust-ports 21 and 21. of the motor have no valves and are shown in Fig. 3. Said ports communicate with an exhaust-pipe 43. (Shown in Figs. 1 and 2.)

Water may be used as a motive power for my engine, and I prefer to modify the con strnction for that purpose by employing one piston-wheel only, provided with two pistons instead of one.

I have described the construction of my motor adapted for steam. Its operation is as follows: The steam is admitted to the pistons 8 and 10 through ports 2O" and 20, respectively. The steam-pressure holds abutments l2 and 14 against piston-wheels 5 and 6 and sets up a revolution of said pistons. The pistons are deflected toward the pistonwheels by the curvature of 1 and the abut- Inents' 12 and 14 are raised by the pistonwheel cams 15 and 16. Said pistons are thus brought into suitable nearly parallel positions for passing beneath said abutments at a moderately high speed without undue shock or strain. The instant said abutments are disengaged from said pistons the jets of steam issuing from inlet-ports and 20 restore said abutments to their hanging positions, pressing against the piston-wheels at their lower edges. When either piston 8 or 10 is disengaged by its revolution from abutment 12 or 14, it flies outward to its normal bearing position against the cylindrical surface, being soimpelled byits inertia, centrifugal force, and the steam-pressure thereon. The outer plates 9 and 11 of said pistons are prevented at this time from forming a forward angle with said pistons by the forward lips of the secondary pivot-socket 15 and the corresponding socket in piston-plate 8. (See Fig. 1.) The steam exhausts through ports 21 and 21. The valves 26 and 27 can be set so as to admit steam simultaneously to the two cylinders of the motor, or any desired interval betweensuch admissions may be obtained by adjusting dogs 36 and and studs 38 and 42. When the rocking shaft 28 is in action, it causes the arms of dogs 36 and 4:0 to be alternately engaged and oscillated by means of the adjustable studs 38 and 42 and the fixed studs 39 and 451, said studs being secured, as above described, to said shaft. It will be seen that the lead and the cut-off of ports 20 and 20 are also adjustable by adjusting said dogs upon said valves and by adjusting studs 38 and 42 upon rocking shaft 28.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a rotary motor, the combination of a piston-wheel provided with a peripheral cam, a sectional piston composed of a relatively large plate pivoted in a socket in the apex of said cam, and a contact-plate having the same width as, but much shorter in a radial direction than, said larger plate; the inner edge of said contact-plate being pivoted to or in the outer edge of said larger plate; a pistoncylinder, the inner periphery of which is mainly concentric with the shaft of said piston-wheel and which forms a stationary inwardly-directed cam presentinga gradual incline to the revolving piston, and an abutment pivoted in or to and depending from, the apex of said stationary cam, said abutment being composed of a main plate and a radially shorter plate pivoted in or to the lower edge of said main plate, substantially as, and for the purpose, described.

2. In a rotary steam-engine, the combina tion, with a pair of cylinders separated by a vertical partition, and a pair of pistons revoluble in said cylinders and secured to a driving-shaft passing through said cylinders, of a U-shaped valve-chest communicating with said cylinders, a pair of oscillating semicylindriform valves seated in longitudinal alinement with each other in the two branches of said valve-chest,a pair of inlet-ports controlled respectively by said valves, a rocking shaft rotatably and axially mounted in said valves and in bearings secured to said valve-chest, said rocking shaft extending outwardly from one end of said valve-chest, a crank-lever secured to said end of the rocking shaft, an eccentric-rod pivoted to the outer end of said cranklever, and an eccentric actuated by the driving-shaft of the engine for oscillating said rocking shaft, substantially as described.

3. In a rotary steam-engine, the combina- IIO tion, with a pair of cylinders separated by a vertical partition or web, a pair of sectional pistons secured oppositely to each other on a driving-shaft and revoluble in said cylinders, and an eccentric mounted on one end of said shaft, of a U-shaped valve-chest secured to said cylinders and communicating therewith by a pair of inlet-ports,a pairof oscillating semicylindriforrn valves seated in longitudinal alinement with each other in the branches of said valve-chest, said valves controlling said ports, a rocking shaft rotatably and axially mounted in said valves and passing therethrough, a crank-lever secured on said rocking shaft, an eccentric-rod connecting said crank-lever with said eccentric, a pair of studs or pins secured in or to said rocking shaft, a pair of angular dogs adj ustably secured to the ends of said valves re- CHARLES W. NEWTON.

Witnesses:

M. L. LANGE, M. N. HIGDON. 

